I have had issues with this enclosure since I got it some 2 years ago. Finally found the latest uploader for windows uploaded it to 1.02 firmware and change the default settings to work with udma mode (not sure why it wasn’t to begin with, I am thinking because of udma harddrive compatability). If you have a oxford 911, 911+, 912, 922 enclosure and want to update it go here http://www.cooldrives.com/firewireinfo.html
choose windows oxford.
you need to find the latest firmwares for it here http://www.fwdepot.com/firewiredepot/firmware/firmware.html
I set mine up with the following settings and finally could get to 16x (25mps burst) with firewire.